Maedi/visna, Biology

Assignment Help:

Maedi/visna

Maedi, a progressive pneumonia, and visna, a neurotropic disease, found in sheep and goats are caused by the Maedi/visna virus, belonging to the family Retroviridae. It is a zoonotic disease. The disease has not been reported from India.Epidemiology: The transmission of disease takes place through inhalation, drinking contaminated water and colostrum by young ones. The intrauterine transmission of  the virus has also been observed.

Clinical signs: Incubation period of over 2 years and has protracted clinical course lasting 6 months to several years.Maedi (progressive pneumonia): Progressive weight loss and dyspnoea, initially detected after exercise, and becomes more apparent over time. Affected sheep straggles, head jerking with inspiration and nostrils are flared. There may be nasal discharge and cough.


Visna: Weakness of the hindleg and stumbling. Progressive weight loss and trembling of facial muscels and limbs is seen leading to paraplegia.
Diagnosis: The disease is diagnosed histopathology. Enzyme immunoassay, agar gel diffusion and syncytial plaque reduction assays are used for detection of antibodies. Western blotting is used for confirmation of the disease. Viral DNA is detected in cells by in situ hybridization or viral RNA amplification by RT-PCR.


Prevention and control: Slaughtering of sero-positive sheep is one of the approaches suggested for containing the infection. Dipping of sheep with acaricides and spraying in environment controls ticks.


Related Discussions:- Maedi/visna

Enzyme-linked receptors, Numerous receptors have intrinsic or tightly relat...

Numerous receptors have intrinsic or tightly related enzyme activity.  On the required of ligand to their extracellular face like receptors undergo a conformational change and acti

Explain some ethological activities, Explain Some Ethological Activities ...

Explain Some Ethological Activities Comparative studies of behaviour or activities are also used in systematic for identification of organisms. The comparative study of the beh

Explain the bulimia nervosa, Explain the Bulimia Nervosa? Diagnostic Cr...

Explain the Bulimia Nervosa? Diagnostic Criteria Bulimia Nervosa patients, unlike those of anorexia nervosa with binge and purge subtype, are typically within the normal weight

Explain advantages of using bacteria as a source of protein, Bacteria:- ...

Bacteria:- Advantages High yield of protein (60-80%) Can be grown on paraffin, cellulose waste and molasses. Growth rate is fast. Disadvantages  If the bacteri

What is human eye accommodation, What is human eye Accommodation The hu...

What is human eye Accommodation The human eye focuses at objects at infinity, without exerting any power. This means that when a person is observing an object at infinity, the

The halstead-reitan neuropsychological battery, The halstead-reitan neurops...

The halstead-reitan neuropsychological battery The beginnings of the battery can be traced to the special laboratory established by Halstead in 1935 for the study of neurosurgi

Surgical treatment options, Cardiomyoplasty This is a procedure wherei...

Cardiomyoplasty This is a procedure wherein the latissimus dorsi muscle is wrapped around the heart and stimulated to contract synchronously with it. It has been largely given

What is atopic dermatitis, Atopic dermatitis is an inflammatory skin diseas...

Atopic dermatitis is an inflammatory skin disease. This disease is observed frequently in young children. There will be skin eruptions.

Zoology, structural adaptation of mammalian alimentary canal

structural adaptation of mammalian alimentary canal

What is the structure that maintains identical chromatids, What is the stru...

What is the structure that maintains identical chromatids bound? The structure that maintains identical chromatids bound is the centromere. Cell Nucleus Review - Image Diver

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd